struct sctp_association *, sctp_socket_type_t);
static char *sctp_hmac_alg = SCTP_COOKIE_HMAC_ALG;
+extern struct kmem_cache *sctp_bucket_cachep;
+extern int sysctl_sctp_mem[3];
+extern int sysctl_sctp_rmem[3];
+extern int sysctl_sctp_wmem[3];
+
+static int sctp_memory_pressure;
+static atomic_t sctp_memory_allocated;
+static atomic_t sctp_sockets_allocated;
+
+static void sctp_enter_memory_pressure(void)
+{
+ sctp_memory_pressure = 1;
+}
+
+
/* Get the sndbuf space available at the time on the association. */
static inline int sctp_wspace(struct sctp_association *asoc)
{
- struct sock *sk = asoc->base.sk;
- int amt = 0;
+ int amt;
- if (asoc->ep->sndbuf_policy) {
- /* make sure that no association uses more than sk_sndbuf */
- amt = sk->sk_sndbuf - asoc->sndbuf_used;
+ if (asoc->ep->sndbuf_policy)
+ amt = asoc->sndbuf_used;
+ else
+ amt = atomic_read(&asoc->base.sk->sk_wmem_alloc);
+
+ if (amt >= asoc->base.sk->sk_sndbuf) {
+ if (asoc->base.sk->sk_userlocks & SOCK_SNDBUF_LOCK)
+ amt = 0;
+ else {
+ amt = sk_stream_wspace(asoc->base.sk);
+ if (amt < 0)
+ amt = 0;
+ }
} else {
- /* do socket level accounting */
- amt = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
+ amt = asoc->base.sk->sk_sndbuf - amt;
}
-
- if (amt < 0)
- amt = 0;
-
return amt;
}
sizeof(struct sctp_chunk);
atomic_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
+ sk_charge_skb(sk, chunk->skb);
}
/* Verify that this is a valid address. */
* socket routing and failover schemes. Refer to comments in
* sctp_do_bind(). -daisy
*/
- retval = sctp_del_bind_addr(bp, sa_addr, call_rcu);
+ retval = sctp_del_bind_addr(bp, sa_addr);
addr_buf += af->sockaddr_len;
err_bindx_rem:
return 0;
}
+/*
+ * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
+ *
+ * This set option adds a chunk type that the user is requesting to be
+ * received only in an authenticated way. Changes to the list of chunks
+ * will only effect future associations on the socket.
+ */
+static int sctp_setsockopt_auth_chunk(struct sock *sk,
+ char __user *optval,
+ int optlen)
+{
+ struct sctp_authchunk val;
+
+ if (optlen != sizeof(struct sctp_authchunk))
+ return -EINVAL;
+ if (copy_from_user(&val, optval, optlen))
+ return -EFAULT;
+
+ switch (val.sauth_chunk) {
+ case SCTP_CID_INIT:
+ case SCTP_CID_INIT_ACK:
+ case SCTP_CID_SHUTDOWN_COMPLETE:
+ case SCTP_CID_AUTH:
+ return -EINVAL;
+ }
+
+ /* add this chunk id to the endpoint */
+ return sctp_auth_ep_add_chunkid(sctp_sk(sk)->ep, val.sauth_chunk);
+}
+
+/*
+ * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
+ *
+ * This option gets or sets the list of HMAC algorithms that the local
+ * endpoint requires the peer to use.
+ */
+static int sctp_setsockopt_hmac_ident(struct sock *sk,
+ char __user *optval,
+ int optlen)
+{
+ struct sctp_hmacalgo *hmacs;
+ int err;
+
+ if (optlen < sizeof(struct sctp_hmacalgo))
+ return -EINVAL;
+
+ hmacs = kmalloc(optlen, GFP_KERNEL);
+ if (!hmacs)
+ return -ENOMEM;
+
+ if (copy_from_user(hmacs, optval, optlen)) {
+ err = -EFAULT;
+ goto out;
+ }
+
+ if (hmacs->shmac_num_idents == 0 ||
+ hmacs->shmac_num_idents > SCTP_AUTH_NUM_HMACS) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = sctp_auth_ep_set_hmacs(sctp_sk(sk)->ep, hmacs);
+out:
+ kfree(hmacs);
+ return err;
+}
+
+/*
+ * 7.1.20. Set a shared key (SCTP_AUTH_KEY)
+ *
+ * This option will set a shared secret key which is used to build an
+ * association shared key.
+ */
+static int sctp_setsockopt_auth_key(struct sock *sk,
+ char __user *optval,
+ int optlen)
+{
+ struct sctp_authkey *authkey;
+ struct sctp_association *asoc;
+ int ret;
+
+ if (optlen <= sizeof(struct sctp_authkey))
+ return -EINVAL;
+
+ authkey = kmalloc(optlen, GFP_KERNEL);
+ if (!authkey)
+ return -ENOMEM;
+
+ if (copy_from_user(authkey, optval, optlen)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ asoc = sctp_id2assoc(sk, authkey->sca_assoc_id);
+ if (!asoc && authkey->sca_assoc_id && sctp_style(sk, UDP)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = sctp_auth_set_key(sctp_sk(sk)->ep, asoc, authkey);
+out:
+ kfree(authkey);
+ return ret;
+}
+
+/*
+ * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
+ *
+ * This option will get or set the active shared key to be used to build
+ * the association shared key.
+ */
+static int sctp_setsockopt_active_key(struct sock *sk,
+ char __user *optval,
+ int optlen)
+{
+ struct sctp_authkeyid val;
+ struct sctp_association *asoc;
+
+ if (optlen != sizeof(struct sctp_authkeyid))
+ return -EINVAL;
+ if (copy_from_user(&val, optval, optlen))
+ return -EFAULT;
+
+ asoc = sctp_id2assoc(sk, val.scact_assoc_id);
+ if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
+ return -EINVAL;
+
+ return sctp_auth_set_active_key(sctp_sk(sk)->ep, asoc,
+ val.scact_keynumber);
+}
+
+/*
+ * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
+ *
+ * This set option will delete a shared secret key from use.
+ */
+static int sctp_setsockopt_del_key(struct sock *sk,
+ char __user *optval,
+ int optlen)
+{
+ struct sctp_authkeyid val;
+ struct sctp_association *asoc;
+
+ if (optlen != sizeof(struct sctp_authkeyid))
+ return -EINVAL;
+ if (copy_from_user(&val, optval, optlen))
+ return -EFAULT;
+
+ asoc = sctp_id2assoc(sk, val.scact_assoc_id);
+ if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
+ return -EINVAL;
+
+ return sctp_auth_del_key_id(sctp_sk(sk)->ep, asoc,
+ val.scact_keynumber);
+
+}
+
+
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
case SCTP_MAX_BURST:
retval = sctp_setsockopt_maxburst(sk, optval, optlen);
break;
+ case SCTP_AUTH_CHUNK:
+ retval = sctp_setsockopt_auth_chunk(sk, optval, optlen);
+ break;
+ case SCTP_HMAC_IDENT:
+ retval = sctp_setsockopt_hmac_ident(sk, optval, optlen);
+ break;
+ case SCTP_AUTH_KEY:
+ retval = sctp_setsockopt_auth_key(sk, optval, optlen);
+ break;
+ case SCTP_AUTH_ACTIVE_KEY:
+ retval = sctp_setsockopt_active_key(sk, optval, optlen);
+ break;
+ case SCTP_AUTH_DELETE_KEY:
+ retval = sctp_setsockopt_del_key(sk, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
sp->hmac = NULL;
SCTP_DBG_OBJCNT_INC(sock);
+ atomic_inc(&sctp_sockets_allocated);
return 0;
}
/* Release our hold on the endpoint. */
ep = sctp_sk(sk)->ep;
sctp_endpoint_free(ep);
-
+ atomic_dec(&sctp_sockets_allocated);
return 0;
}
return -ENOTSUPP;
}
+static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
+ char __user *optval, int __user *optlen)
+{
+ struct sctp_hmac_algo_param *hmacs;
+ __u16 param_len;
+
+ hmacs = sctp_sk(sk)->ep->auth_hmacs_list;
+ param_len = ntohs(hmacs->param_hdr.length);
+
+ if (len < param_len)
+ return -EINVAL;
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, hmacs->hmac_ids, len))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int sctp_getsockopt_active_key(struct sock *sk, int len,
+ char __user *optval, int __user *optlen)
+{
+ struct sctp_authkeyid val;
+ struct sctp_association *asoc;
+
+ if (len < sizeof(struct sctp_authkeyid))
+ return -EINVAL;
+ if (copy_from_user(&val, optval, sizeof(struct sctp_authkeyid)))
+ return -EFAULT;
+
+ asoc = sctp_id2assoc(sk, val.scact_assoc_id);
+ if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
+ return -EINVAL;
+
+ if (asoc)
+ val.scact_keynumber = asoc->active_key_id;
+ else
+ val.scact_keynumber = sctp_sk(sk)->ep->active_key_id;
+
+ return 0;
+}
+
+static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
+ char __user *optval, int __user *optlen)
+{
+ struct sctp_authchunks __user *p = (void __user *)optval;
+ struct sctp_authchunks val;
+ struct sctp_association *asoc;
+ struct sctp_chunks_param *ch;
+ char __user *to;
+
+ if (len <= sizeof(struct sctp_authchunks))
+ return -EINVAL;
+
+ if (copy_from_user(&val, p, sizeof(struct sctp_authchunks)))
+ return -EFAULT;
+
+ to = p->gauth_chunks;
+ asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
+ if (!asoc)
+ return -EINVAL;
+
+ ch = asoc->peer.peer_chunks;
+
+ /* See if the user provided enough room for all the data */
+ if (len < ntohs(ch->param_hdr.length))
+ return -EINVAL;
+
+ len = ntohs(ch->param_hdr.length);
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(to, ch->chunks, len))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
+ char __user *optval, int __user *optlen)
+{
+ struct sctp_authchunks __user *p = (void __user *)optval;
+ struct sctp_authchunks val;
+ struct sctp_association *asoc;
+ struct sctp_chunks_param *ch;
+ char __user *to;
+
+ if (len <= sizeof(struct sctp_authchunks))
+ return -EINVAL;
+
+ if (copy_from_user(&val, p, sizeof(struct sctp_authchunks)))
+ return -EFAULT;
+
+ to = p->gauth_chunks;
+ asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
+ if (!asoc && val.gauth_assoc_id && sctp_style(sk, UDP))
+ return -EINVAL;
+
+ if (asoc)
+ ch = (struct sctp_chunks_param*)asoc->c.auth_chunks;
+ else
+ ch = sctp_sk(sk)->ep->auth_chunk_list;
+
+ if (len < ntohs(ch->param_hdr.length))
+ return -EINVAL;
+
+ len = ntohs(ch->param_hdr.length);
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(to, ch->chunks, len))
+ return -EFAULT;
+
+ return 0;
+}
+
SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
case SCTP_MAX_BURST:
retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
break;
+ case SCTP_AUTH_KEY:
+ case SCTP_AUTH_CHUNK:
+ case SCTP_AUTH_DELETE_KEY:
+ retval = -EOPNOTSUPP;
+ break;
+ case SCTP_HMAC_IDENT:
+ retval = sctp_getsockopt_hmac_ident(sk, len, optval, optlen);
+ break;
+ case SCTP_AUTH_ACTIVE_KEY:
+ retval = sctp_getsockopt_active_key(sk, len, optval, optlen);
+ break;
+ case SCTP_PEER_AUTH_CHUNKS:
+ retval = sctp_getsockopt_peer_auth_chunks(sk, len, optval,
+ optlen);
+ break;
+ case SCTP_LOCAL_AUTH_CHUNKS:
+ retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
+ optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
sctp_local_bh_disable();
if (snum == 0) {
- /* Search for an available port.
- *
- * 'sctp_port_rover' was the last port assigned, so
- * we start to search from 'sctp_port_rover +
- * 1'. What we do is first check if port 'rover' is
- * already in the hash table; if not, we use that; if
- * it is, we try next.
- */
- int low = sysctl_local_port_range[0];
- int high = sysctl_local_port_range[1];
- int remaining = (high - low) + 1;
- int rover;
- int index;
-
- sctp_spin_lock(&sctp_port_alloc_lock);
- rover = sctp_port_rover;
+ /* Search for an available port. */
+ int low, high, remaining, index;
+ unsigned int rover;
+
+ inet_get_local_port_range(&low, &high);
+ remaining = (high - low) + 1;
+ rover = net_random() % remaining + low;
+
do {
rover++;
if ((rover < low) || (rover > high))
next:
sctp_spin_unlock(&head->lock);
} while (--remaining > 0);
- sctp_port_rover = rover;
- sctp_spin_unlock(&sctp_port_alloc_lock);
/* Exhausted local port range during search? */
ret = 1;
atomic_sub(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
+ /*
+ * This undoes what is done via sk_charge_skb
+ */
+ sk->sk_wmem_queued -= skb->truesize;
+ sk->sk_forward_alloc += skb->truesize;
+
sock_wfree(skb);
__sctp_write_space(asoc);
struct sctp_ulpevent *event = sctp_skb2event(skb);
atomic_sub(event->rmem_len, &sk->sk_rmem_alloc);
+
+ /*
+ * Mimic the behavior of sk_stream_rfree
+ */
+ sk->sk_forward_alloc += event->rmem_len;
}
sctp_release_sock(newsk);
}
+
+DEFINE_PROTO_INUSE(sctp)
+
/* This proto struct describes the ULP interface for SCTP. */
struct proto sctp_prot = {
.name = "SCTP",
.unhash = sctp_unhash,
.get_port = sctp_get_port,
.obj_size = sizeof(struct sctp_sock),
+ .sysctl_mem = sysctl_sctp_mem,
+ .sysctl_rmem = sysctl_sctp_rmem,
+ .sysctl_wmem = sysctl_sctp_wmem,
+ .memory_pressure = &sctp_memory_pressure,
+ .enter_memory_pressure = sctp_enter_memory_pressure,
+ .memory_allocated = &sctp_memory_allocated,
+ REF_PROTO_INUSE(sctp)
};
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+DEFINE_PROTO_INUSE(sctpv6)
+
struct proto sctpv6_prot = {
.name = "SCTPv6",
.owner = THIS_MODULE,
.unhash = sctp_unhash,
.get_port = sctp_get_port,
.obj_size = sizeof(struct sctp6_sock),
+ .sysctl_mem = sysctl_sctp_mem,
+ .sysctl_rmem = sysctl_sctp_rmem,
+ .sysctl_wmem = sysctl_sctp_wmem,
+ .memory_pressure = &sctp_memory_pressure,
+ .enter_memory_pressure = sctp_enter_memory_pressure,
+ .memory_allocated = &sctp_memory_allocated,
+ REF_PROTO_INUSE(sctpv6)
};
#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
projects / deliverable / linux.git / blobdiff